function replaceSubstring(input, from, to) {
  // Goes through the input and replaces every occurrence of from with to
  //By droptchyald[dropt@bean-o.com] 
  var output='';
  while(input.length >= from.length && input.length > 0 && from.length > 0){
  if(input.substring(0,from.length) == from){
   output += to;
   input = input.substring(from.length);
  }else{
   output += input.substring(0,1);
   input = input.substring(1);
  }
 }
 return output + input;
}

function replaceSubstring2(input, from, to) {
 // Goes through the input and replaces every occurrence of from with to
 //By droptchyald[dropt@bean-o.com] 
 var output='';
 var count=0;
 while(input.length >= from.length && input.length > 0 && from.length > 0){
  if(input.substring(0,from.length) == from){
   output += to;
   input = input.substring(from.length);
  }else{
   output += input.substring(0,1);
   input = input.substring(1);
  }
 }
  output += input;
 if(count == 0)
   return output;
  return replaceSubstring(output, from, to);
}

function replaceSubstring3(text,expression,value){
  //Uses regular expressions. This code was written for JavaScript 1.2+ browsers
  //Use the replaceSubstring or replaceSubstring2 functions if 1.0 & 1.1 browsers.
  //
  //replaceSubstring("hellothere","l","x") = "hexxothere"
  var exp = new RegExp(expression,'g')
  return text.replace(exp,value) 
}

function replaceSubstring4(inputString, fromString, toString) {
var tempString = inputString;
for(var i=0;i<inputString.length;i++) {tempString = tempString.replace(fromString,toString);}
return tempString;
}